Rick-
...as I just mentioned in your Lane Poor's thread, I do have the Basslines MM + preamp(I had the Bart MM + preamp). IMO, the Basslines was a definite improvement vs. the Bart MM.
Truthfully, I do not not play that bass too much; it's an on-going project(besides, it weighs 14 LBs).
In fact, I was looking at it tonight: IMO, a pickup in the neck position might help(like a Lakland), then again, maybe I should've placed the pickup a little 'North' of the typical MM position. Live & learn, I guess.
In any event, the pickup + preamp does has thump & nice highs...the mids were so 'good', I slapped my fretless neck on it; finally, some growl(that fretless neck just would 'work' on any of my other logs).

Jim - I appreciate you posting here, too. My confidence level just went up more. I don't know if the Bart MM has an alnico magnet option like the Basslines. It may cost a lot more, but I'm betting it's worth the extra money. I also like the sound of having the slap contour switch that comes with the 3-Band Tone Cirucit/preamp.

At least Basslines allow you a couple weeks or so to return them if they're not what you wan. But why not avoid that possiblity.